Forging machine



July 31, 1928.

0. .1. O'ROURKE FORGING MACHINE Filed July 9, 1917 2 Sheets-Sheet f'nveni'o {6' Danie] J0 Adm Patented July 31, 1928.

UNITED STATES PATENT OFFICE.

DANIEL J. OROURKE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

FORGING MACHINE.

Application m July 9, i917. Serial No. 179,535.

My invention relates to forging machines.

It has for its object to provide an improved and simplifiedmeans whereby the axial opening in hollow drill steels may be expanded either during the process of manufacture or during that of re-sharpening. A further object of my invention is to provide an improved and simplified mechanism readily adapted to be installed upon or adjacent a. sharpening machine and adapted to be controlled in a convenient manner by the work itself, all necessity for providing expensive separate apparatus, changing dollies, or providing any separate controlling mech anism requiring manipulation by the operator, being eliminated. A further object of my invention is to provide an improved mechanism for opening the holes in obstructed drill steels which will do away with some of the complications ofpresent devices and which by operating the hole opening implement by means of a series of rapid blows will enable the operator to hold the steel in hls hands unsupported during the hole opening operation and will permit the extraetionof the devicewhich opens the hole without resort to mechanical instrumentalities. These and other objects and advantages of my improved construction will, however, hereinafter more fully appear.

In the accompanying drawings, I have shown, for purposes of illustration, one embodiment which my invention may assume in practice.

In these drawings,

Fig. 1 is a side elevation of a drill sharpener of standard form equipped with my improved hole opening mechanism.

Fig. 2 is a side elevation of my improved hole expanding mechanism, the same being shown carried on its support and with a steel inserted over its expanding bit.

Fig. 3 is a plan view of the construction shown in Fig. 2, the view being taken at right angles to that shown in Fig. 2, with the support in section.

Fig. 4 is a detail view of the hole expanding bit.

Fig. -5 is a longitudinal sectional view of the expanding tool, the same being shown with thecontrolling mechanism in operating position.

In this illustrative construction, it will be noted that I have shown a drill sharpener of standard form, such as that constituting the invention of one Wade H. Wineman and now widely sold commercially, and including a base 1 having power operated clamping, upsetting, and swaging mechanisms thereon. Of these mechanisms, the clamping mechanism comprises a stationary clamping die2 carried on the frame, and a. cooperating movable clamping die 3 operated by suitable power means, while the upsetting mechanism comprises a reciprocating'dolly 4 operated by power and adapted to upset the steel clamped between the dies 2 and 3. The swaging mechanism, as shown, also includes a stationary swaging die 5 and a movable swaging die Gysuitably operated by power. As in the construction mentioned above, the clamping and upsetting mechanism is shown to be controlled through a suitable controlling connection with a handle 7, while the swaging mechanism is controlled through a a suitable controlling foot lever 8, suitable interlocking mechanism of a well known type preferably being 'provided between these two controlling mechanisms.

In my improved construction, I have provided improved means adapted to be as-' sociated with the drill sharpener whereby whenever desired, as, for instance, while the operator is upsetting the steel with the dolly, or during the swaging operation, he is enabled to expand the axial opening in hollow drill steels with great facility and without the necessity for changing the dolly 4 or operating any additional controlling levers, the expanding mechanism being set in operation by the work when the end of the drill steel is inserted over the expanding bit, and automatically cut out of operation when the steel is removed therefrom. As shown, a suitable support 9 is provided, preferably disposed adjacent the drill sharpener. This support carries thereon in asuitable bracket 10 a, pneumatic tool, herein in the form of a hammer 11, suitable bolts 12'being herein shown inserted through the opening 13 in the supporting member 14 of the hammer to hold the latter in substantially fixed position in the desired plane. As shown, a suitable conical or otherwise shaped punch or hole expanding bit 15, corresponding in contour tothe desired shape of that portion of the bore extending through the ends of steels fre qucntly subjected to reforging, is carried by the tool 11 and disposed toward the operator-so that he may conveniently press the hollow drill. steel thereon or remove the same therefrom without a decided swinging movement of the steel.

In the form of my invention shown herein, the hammer 11 comprises a suitable cylinder 16 reciprocable relative to the member 14: and having suitable fluid passages (shown only in part) arranged to cause a hammer piston 17 to reciprocate into and out of engagement with the inner end 18 of the expanding tool 15. This tool as shown is in turn carried in a suitable non-rotating chuck 19 and is provided with a flange 20 on its inner end adapted alternately to engage the front end of the chuck and a suitable flange 21 on a removable cap or housing 22. As shown, air or other pressure fluid is supplied to this hammer through a suitable inlet plug 23 carried on the cylinder, a limited longitudinal movementbetween the cylinder and the handle being permitted by a slot 24-. through which the plug 23 extends. It will also be noted that a throttle valve 25 is disposed at the rear endof the cylinder; and upon rearward axial movement of the hammer relative to the supporting member 1 1, the supply of motive fluid past the valve is opened, and upon movement of the hammer in the opposite direction, the supply of fluid to the hammer is cut oil. Air pressure is supplied to the forward area of the valve from the plug 23 through a port 26. If desired, a suitable controlling mechanism, such for example as is disclosed in the patent to Gilman 902,288, Oct. 27, 1908, and for purposes of illustrationshown herein as a valve 27 receives air from the valve 25 through a.

, passage 28 and is adapted alternately to adthereby mit pressure fluid to the opposite ends of the cylinder 16 in a well known manner and piston\17 in the cylinder It will thus be observed-that in this construction the cylinder 16 and member 1 1 are relatively reciprocable, and that when pressure is applied to the bit 15 or removed therefrom through the movement of the cylinder, the throttle valve 25 is so positioned relative to said cylinder as to cause air to be admitted from the supplyplug 23 to the valve 27 to start the hammer piston in motion or to cause the air supply to be cut off to stop the movement of the piston.

In the operation of my improved construction, it is possible. for theoperator to apply a hollow drill steel, herein indicated at A, to the end of the expanding tool 15 while the latter is at rest and, by pressing cause reciprocation of the hammerthe same-as desired. It will also be noted that when the operator desiresto remove the steel from the expanding bit 15, it is only necessary for him to pull on the steel in order to remove the steel and thereby move the cylinder 16 in the opposite direction and cut the piston 17 out of operation. -It will be obvious that with this improved mechanism the operator by reason of the rapid series of relatively light blows can without discomfort or difliculty hold the steel in his hands and so dispense with clamping mechanisms which-have previously been employed. It will also be obvious that the repeated light blows will open the hole in such manneras to tool 15 therein.

In addition to the foregoing modes of operation, it is to be noted that the structure also makes possible operation in the following manner: Should the punch pin lodge in the opening, as may occur, the operator can remove the punch pin from the bore with greater ease by making use of the hammer prevent sticking of the bit expanding to imparta jarring effect tending to loosen the pin. Assuming that the'punch has been driven into the steel, the operator by pulling outwardly on the steel would cause the pin to be pulled out of range of the hammer. In order then to continue the operation of the hammer the operator, while pulling outwardly on the steel, may place his foot against the housing 22 and move the cylinder 16 rearwardly thereby causing communi- 1 cation between the passageways leading from the opening 23 and transversely of the bore of the valve 25 to the hammer. Fluid flowing through said passages will cause reciprocation of the hammer, but due to the fact that the pin is out of range of the hammer no direct impact action will be imparted thereto. However, the cushioning action on the rearward stroke of the hammer piston is sufficient to impart a jarring action to the pin throughthe housing 22 which has contact with the pin collar 20. It will also be noted that the operator in pressing rearwardly on the housing 22 with his foot and pulling outwardly on the drill steel can control to a practical nicety-thc position of the cylinder 16 in the supporting member 14 to such anextent that the cylinderneed not be 1 moved to its rearmost position, but may be spaced a slight distance from the end of the bore before mentioned, thereby permitting the hammer mechanism to be yieldably movable in arearward direction during removal of the pin and operation of the motor.

By my improvement, it will be noted that all necessity for providing separate punches operated by air or oil and controlled through the manipulation of separate controlling mechanism, changing dollies, or the provision of separate punching mechanism operatively connected to the drill sharpener and requiring manipulation by the operator of separate controlling mechanism, is effectuallv overcome, the expense necessary to provi e a punching attachment being thereby very materially decreased at the same time that the work of the operator is greatly facilitated. It will also be evident that, if desired, my improved punching mechanism may be used in connection with a sharpener of any type, and that the same may be conveniently located in any desired position and either on the frame of the sharpener oradjacent thereto. These and other advantages of my improved construction will, however,-

be clearly apparent to those skilled in the art.

While I have in this application specifically described one embodiment which my invention may assume in practice, it is to be understood that the same is shown herein for purposes of illustration and that the invention may be modified and assume various other forms without departing from its spirit, it being my intention to include all such modifications within the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. A bore opening mechanism for hollow ,drillsteels comprising'the combination of a support, an elongated bore opening pin mounted thereon, holding means permlttlng relative movement axlally between said P111 and support, a hammering device on said support comprising means for imparting a series of impacts directly on said pin, said holding means permitting said pin to remain lodged in the drill steel bore while permitting relative movement between said pin and support.

2. A bore opening mechanism for hollow drill steels comprising the combination of a support, an elongated bore opening pin mounted thereon, holding means permitting relative movement axially between said pin and support, a hammering device on said support comprising means controlled through engagement of the pin in a bore for imparting a series of impacts directly on said pin, said holding means permitting relative movement between said pin and support and constituting means permitting movement of said pin and steel in unison relatively to said support to shift said pin from the range of impact action of said hammering mechanism. 7

one end of said 3. A bore opening mechanism for hollow drill steels comprising the combination of a support, an elongated bore opening pin mounted thereon, a hammering mechanism also mounted thereon and adapted to impart a series of impacts directly on one end of said pin for driving the same into an obprior to withdrawal of said pin from the bore, the steel and pin moving together during the existence of said binding contact.

4. A bore opening mechanism for hollow drill steels comprising the combination of a support, a horizontally extended elongated punch pin mounted thereon, a hammering mechanism also mounted thereon and adapted to impart a series. of impacts directly on pin for driving the same into an obstructed drill steel bore and into binding contact with the periphery thereof, pin holding'means permitting positive relative movement between said pin and hammer into and out of operative relation to be effected by movement of the steel prior to withdrawal of said pin from the bore, said positive relative movement necessitating the existence of said binding action.

5. A bore opening mechanism for hollow trolling actuation of the blow imparting means through relative movement between the cooperating portions of said hammering mechanism.

6. A bore opening mechanism for a hollow drill steel comprising a support, an elongated punch pin mounted thereon, a pneumatic hammer mounted in cooperating relation thereto, means whereby the same is actuated to impart a series of impacts to one end of said pin, and means permitting actuation of said hammer during withdrawal of said pin from said bore.-

7. A bore opening mechanism" for a hollow drill steel comprising a support, an elongated punch pin mounted thereon in horizontal position, a pneumatic hammer mount ed in cooperating relation thereto, means whereby the same is actuated to impart a series of impacts to said pin, means permitting actuation of said hammer during withdrawal of said pin from said hole, and means permitting said pin to be placed out of range of the hammer during withdrawal.

8. A bore opening mechanism for hollow drill steels comprising a support, an elongated punch-pin mounted thereon in horizontal position, a pneumatic hammer mounted in cooperating relation thereto,means for longitudinally slidably supporting said ham- 5 mer, means for setting said hammer in operation upon longitudinal movement thereof,

to impart a series of impacts directly on said pin to drive the same into an obstructed drill steel bore, and means permitting withdrawal of the pin from range of the ham- 10 mer While maintaining operation of the hammer.

In testimony whereof I aflix my signature.

DANIEL J. OROURKE. 

